It is often said that a successful landing follows a successful approach, so...if the crew were indeed fatigued, why did they not request an ILS approach to a different runway, for safety considerations?
Pressure from management perhaps, ie; on time...every time?
'Tis the COMMANDERS responsibility to assure safe and proper operation of the aircraft, ie; the buck stops with HIM (or her), not others.
And, it will always remain thus.
So, act accordingly....period.
Rocket science it ain't.